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EP3590353A1 - Procédé de fabrication d'une farine de guarée fermentée - Google Patents

Procédé de fabrication d'une farine de guarée fermentée Download PDF

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Publication number
EP3590353A1
EP3590353A1 EP18760923.5A EP18760923A EP3590353A1 EP 3590353 A1 EP3590353 A1 EP 3590353A1 EP 18760923 A EP18760923 A EP 18760923A EP 3590353 A1 EP3590353 A1 EP 3590353A1
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EP
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Prior art keywords
guar meal
guar
fermented
meal
bacillus
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Granted
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EP18760923.5A
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German (de)
English (en)
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EP3590353B1 (fr
EP3590353A4 (fr
Inventor
Kyeongil KANG
Seong Jun Cho
Jehoon RYU
Kyung Hoon Chang
Seung Won Park
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CJ CheilJedang Corp
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CJ CheilJedang Corp
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Publication of EP3590353A4 publication Critical patent/EP3590353A4/fr
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    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23L—FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES, NOT OTHERWISE PROVIDED FOR; PREPARATION OR TREATMENT THEREOF
    • A23L11/00—Pulses, i.e. fruits of leguminous plants, for production of food; Products from legumes; Preparation or treatment thereof
    • A23L11/30—Removing undesirable substances, e.g. bitter substances
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23K—FODDER
    • A23K10/00—Animal feeding-stuffs
    • A23K10/10—Animal feeding-stuffs obtained by microbiological or biochemical processes
    • A23K10/16—Addition of microorganisms or extracts thereof, e.g. single-cell proteins, to feeding-stuff compositions
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23K—FODDER
    • A23K10/00—Animal feeding-stuffs
    • A23K10/10—Animal feeding-stuffs obtained by microbiological or biochemical processes
    • A23K10/12—Animal feeding-stuffs obtained by microbiological or biochemical processes by fermentation of natural products, e.g. of vegetable material, animal waste material or biomass
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23K—FODDER
    • A23K10/00—Animal feeding-stuffs
    • A23K10/10—Animal feeding-stuffs obtained by microbiological or biochemical processes
    • A23K10/14—Pretreatment of feeding-stuffs with enzymes
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23K—FODDER
    • A23K10/00—Animal feeding-stuffs
    • A23K10/10—Animal feeding-stuffs obtained by microbiological or biochemical processes
    • A23K10/16—Addition of microorganisms or extracts thereof, e.g. single-cell proteins, to feeding-stuff compositions
    • A23K10/18—Addition of microorganisms or extracts thereof, e.g. single-cell proteins, to feeding-stuff compositions of live microorganisms
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23K—FODDER
    • A23K10/00—Animal feeding-stuffs
    • A23K10/30—Animal feeding-stuffs from material of plant origin, e.g. roots, seeds or hay; from material of fungal origin, e.g. mushrooms
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23K—FODDER
    • A23K10/00—Animal feeding-stuffs
    • A23K10/30—Animal feeding-stuffs from material of plant origin, e.g. roots, seeds or hay; from material of fungal origin, e.g. mushrooms
    • A23K10/37—Animal feeding-stuffs from material of plant origin, e.g. roots, seeds or hay; from material of fungal origin, e.g. mushrooms from waste material
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23K—FODDER
    • A23K40/00—Shaping or working-up of animal feeding-stuffs
    • A23K40/10—Shaping or working-up of animal feeding-stuffs by agglomeration; by granulation, e.g. making powders
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23K—FODDER
    • A23K50/00—Feeding-stuffs specially adapted for particular animals
    • A23K50/10—Feeding-stuffs specially adapted for particular animals for ruminants
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23K—FODDER
    • A23K50/00—Feeding-stuffs specially adapted for particular animals
    • A23K50/30—Feeding-stuffs specially adapted for particular animals for swines
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23K—FODDER
    • A23K50/00—Feeding-stuffs specially adapted for particular animals
    • A23K50/70—Feeding-stuffs specially adapted for particular animals for birds
    • A23K50/75—Feeding-stuffs specially adapted for particular animals for birds for poultry
    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
    • C12N1/00—Microorganisms, e.g. protozoa; Compositions thereof; Processes of propagating, maintaining or preserving microorganisms or compositions thereof; Processes of preparing or isolating a composition containing a microorganism; Culture media therefor
    • C12N1/20—Bacteria; Culture media therefor

Definitions

  • the present disclosure relates to a method of preparing a fermented guar meal, a fermented guar meal prepared by the method, and a feed composition including the fermented guar meal.
  • Guar Cyamopsis tetragonoloba ) belongs to the family fabaceae, and is used as an alternative to locust bean gum.
  • Guar seed is known to be composed of 14% to 18% hull, 34% to 42% endosperm, and 43% to 47% germ.
  • guar endosperm includes a large amount of galactomannan gum (guar gum), and it is known that guar endosperm is used as a food additive such as an emulsifier, a thickener, and a food adhesive as well as used in fracking (hydraulic fracturing) extraction of shale oil and gas.
  • Guar germ and guar hull are generated as by-products during guar gum production.
  • Guar meal refers to a mixture of the germ and hull, and is generally used as a raw material for feeds.
  • guar meal has a relatively low protein content, as compared with animal proteins, and is poor in the contents of essential amino acids, vitamins, minerals, and UGF (Unknown Growth Factor), as compared with animal proteins in feeds for young livestock, such as fish meal, milk, etc., and includes anti-nutritional factors (ANFs) such as trypsin inhibitors, saponins, residual guar gum, and tannins.
  • AMFs anti-nutritional factors
  • anti-nutritional factors such as trypsin inhibitors (TI) and saponins may reduce digestibility of young livestock and may inhibit growth thereof, it is not added to feeds for young livestock and its use in feeds for growing pigs or cattle is also very limited.
  • An object of the present disclosure is to provide a method of preparing a fermented guar meal, the method including the steps of (1) pretreating a guar meal; (2) seeding a Bacillus strain in the pretreated guar meal; and (3) solid-state fermenting the strain seeded in the guar meal to obtain the fermented guar meal.
  • Another object of the present disclosure is to provide a fermented guar meal prepared by the above method.
  • Still another object of the present disclosure is to provide a feed composition including the fermented guar meal.
  • a method of preparing a fermented guar meal of the present disclosure may be used to prepare a fermented guar meal which is a high-quality plant protein source having improved nutritional components and digestibility, thereby providing a protein feed composition including the fermented guar meal, the protein feed composition having a reduced feed blending ratio and probiotics effects.
  • viscosity of guar gum in the guar meal may be reduced, and in particular, contents of indigestible oligosaccharides and trypsin inhibitors (TI) in the guar meal may be remarkably reduced, thereby preparing a high-quality fermented guar meal having more improved digestibility.
  • the present disclosure provides a method of preparing a fermented guar meal, the method including the steps of (1) pretreating a guar meal; (2) seeding a Bacillus strain in the pretreated guar meal; and (3) solid-state fermenting the strain seeded in the guar meal to obtain the fermented guar meal.
  • Guar Cyamopsis tetragonoloba
  • Cluster bean is a plant belonging to the family fabaceae, and grows up to 2 m to 3 m and lives in symbiosis with nitrogen-fixing bacteria. Mature guar is mainly used as a feed for livestock, and also used as a green manure to provide nutritional components for soils. Beans of guar contain many nutrients, but it is not easy to use guar beans for food, unless anti-nutritional factors such as trypsin inhibitors are removed therefrom.
  • Guar gum also called guaran, refers to galactomannan contained in guar. Guar gum is a polysaccharide consisting of galactose and mannose, and is a substance widely used in chemical and medical fields.
  • Guar meal is a by-product generated during production of guar gum, and is a mixture of about 25% germs and about 75% hulls. Although guar meal may be used as a feed composition due to abundant proteins, there is a problem of low digestibility due to anti-nutritional factors, etc.
  • the step of pretreating the guar meal of the step (1) may include the steps of (1-1) adding water to the guar meal to control a water content thereof; (1-2) heat-treating the water content-controlled guar meal; and (1-3) cooling the heat-treated guar meal.
  • the step (1-1) is a water-adding step of adding water to the guar meal to control the water content thereof, and with respect to the purpose of the present disclosure, the step corresponds to a pretreatment step which is necessary for fermentation of the guar meal by seeding the bacteria in the guar meal.
  • a method of adding water to the guar meal a method known in the art may be used without limitation.
  • the water content-controlled guar meal of the step (1-1) may have a water content of 30% to 60%(w/w), specifically 35% to 50%(w/w), and more specifically 40% to 45%(w/w), but is not limited thereto.
  • the guar meal having a water content within the above range may prevent delay of the fermentation due to low moisture, may improve a problem of requiring high costs in a drying process after transferring and fermenting the guar meal, and may be advantageous in terms of heat efficiency.
  • the water content is too low, sufficient fermentation of the guar meal does not occur, thereby generating a problem of quality deterioration due to contaminants.
  • the water content is too high, for example, the water content is 50% or more, there is no problem in the quality, but it is difficult to design the process, and workability and production cost competitiveness may be significantly deteriorated in the process of solid-state fermentation.
  • the step (1-2) is a heating step of heat-treating the water content-controlled guar meal, and the purpose of the heat treatment is to kill germs in the raw guar meal, to destroy cell walls of the guar meal, and to denature proteins, thereby providing an environment in which the desired microorganisms are able to grow vigorously.
  • the heat treatment may be performed using various methods known in the art.
  • the heat treatment of the step (1-2) is to treat the guar meal at 85°C to 95°C, and more specifically at 90°C to 95°C, but is not limited thereto.
  • the heat treatment of the step (1-2) is to treat the guar meal at 85°C to 100°C for 20 minutes to 35 minutes, and specifically at 90°C to 95°C for 25 minutes to 30 minutes.
  • the guar meal may be treated at a temperature of 100°C or less without thermodynamic pressurization.
  • the step (1-3) is to cool the heat-treated guar meal and to seed the Bacillus strain in the guar meal, and is a process required to induce fermentation by cooling the temperature of the guar meal which is increased in the heating step and by seeding the Bacillus strain as a fermentation strain.
  • the cooling may be naturally performed after terminating the heat treatment.
  • the cooling may be easily performed through a conveying process using a conveyor-type cooling apparatus.
  • the cooling of the step (1-3) may be performed at a temperature of 20°C to 60°C, and more specifically at a temperature of 30°C to 50°C, but is not limited thereto.
  • the Bacillus strain of the step (1-3) may be Bacillus subtilis or Bacillus amyloliquefaciens, and more specifically, one kind of Bacillus subtilis (ATCC21770), and four kinds of Bacillus amyloliquefaciens ( Bacillus amyloliquefaciens K2G (Korean Patent NO. 10-1517326 ), ATCC 23842, ATCC 23843, and ATCC 23845).
  • ATCC21770 Bacillus subtilis
  • Bacillus amyloliquefaciens K2G Korean Patent NO. 10-1517326
  • ATCC 23842, ATCC 23843, and ATCC 23845 ATCC 23842G
  • ATCC 23842G Korean Patent NO. 10-1517326
  • the Bacillus strain may be seeded in an amount of 5% by weight to 20% by weight based on the weight of the guar meal, but is not limited thereto.
  • the step (3) is a step of solid-state fermenting the strain seeded in the guar meal to obtain the fermented guar meal, and this step corresponds to culture and fermentation steps in the method of preparing the fermented guar meal of the present disclosure.
  • the culture may be performed in a solid state, and for example, the culture may be to perform fermentation using a packed-bed fermentor, etc.
  • solid-state fermentation refers to culturing a microorganism or cells of an animal or a plant on a solid medium such as agar, gelatin, etc., and as the method, a method known in the art may be used without limitation.
  • the packed-bed fermentor may include various types such as a batch-type aeration fermentor, a close-type fermentor, a continuous aeration fermentor, etc., and any type may be used without particular limitations in the method of the present disclosure, as long as it is useful for solid-state fermentation of the guar meal.
  • An appropriate apparatus may be selected according to a production scale and then used.
  • a general fermentation process may involve a solid fermentation process of 48 hours to 72 hours when yeasts, lactic acid bacteria, or fungi are used, because biological activities such as metabolisms and enzymatic activities may differ according to each strain. However, when the Bacillus strain is used, the fermentation process may be terminated within 24 hours, and specifically, may be performed for about 16 hours.
  • the solid-state fermenting of the step (3) may be performed at a temperature of 30°C to 50°C for 15 hours to 25 hours, and more specifically, at a temperature of 37°C to 45°C for 14 hours to 16 hours.
  • the number of the live bacteria may be specifically 10 7 CFU/g to 10 8 CFU/g, but is not limited thereto.
  • probiotics refer to live microorganisms that enter the body to exhibit beneficial effects on health.
  • the method of the present disclosure may further include the step (4) of drying and pulverizing the fermented guar meal after the above step (3).
  • the conditions of the fermented guar meal are very favorable, but it forms a loose aggregate in part. Therefore, it is necessary to pulverize the fermented guar meal to a uniform particle size after drying.
  • the drying and pulverizing may be performed by various methods known in the art. However, when the drying is performed at an excessively high temperature, most live bacteria in the fermented guar meal may be killed, and therefore, it requires caution. For this reason, the drying must be performed at a low temperature at which live bacteria are not killed, and may be performed using hot air with a low temperature and low humidity, but is not limited thereto.
  • the pulverizing may be performed to pulverize the fermented guar meal in various sizes depending on the intended purpose of use.
  • the pulverization method may be performed using, for example, a hammer mill.
  • the present disclosure provides a fermented guar meal prepared by the method of preparing the fermented guar meal.
  • the fermented guar meal may include the Bacillus strain, and more specifically, the Bacillus strain may be Bacillus amyloliquefaciens, but are not limited thereto.
  • a fermented guar meal is fermented using the Bacillus amyloliquefaciens strain according to the above-described method of the present disclosure, it is possible to obtain a fermented guar meal in which various anti-nutritional factors including TI in the guar meal may be reduced, digestibility may be improved due to hydrolysis and low molecularization of proteins, and the content of crude protein may be increased. Since this fermented guar meal has an improved absolute value as a feed, it is a high-quality feed material as a substitute for animal proteins, and thus, its availability is very high.
  • the guar meal includes 4% to 6% oligosaccharides.
  • oligosaccharides raffinose and stachyose which are indigestible oligosaccharides, i.e., galacto-oligosaccharides (hereinafter, referred to as GOS) occupy 2% to 3%.
  • GOS galacto-oligosaccharides
  • the indigestible oligosaccharides are problematic in that they may be used as a nutritional source of harmful intestinal microorganisms or may cause diarrhea.
  • the content of indigestible oligosaccharides in the guar meal fermented according to the method of the present disclosure is considerably reduced. Thus, when the fermented guar meal is used as a feed composition, it may exhibit excellent digestibility.
  • the content of trypsin inhibitors in the fermented guar meal prepared by the method of the present disclosure may be about 30% to about 50%, based on the content of trypsin inhibitors (TI) in a guar meal which does not undergo the steps (1) to (3).
  • the content of indigestible oligosaccharides in the fermented guar meal prepared by the method of the present disclosure may be about 10% to about 40%, based on the content of indigestible oligosaccharides in a guar meal which does not undergo the steps (1) to (3).
  • the fermented guar meal of the present disclosure has no problem in preference, and its feed conversion ratio is also similar to that of soybean meal, and therefore, the fermented guar meal may be widely used as a protein source to replace soybean meal.
  • the present disclosure provides a feed composition including the fermented guar meal prepared by the method of preparing the fermented guar meal.
  • the term "feed composition” refers to a material providing organic or inorganic nutrients which are necessary to maintain life of a subject or to raise the subject.
  • the feed composition may include nutrients such as energy, proteins, lipids, vitamins, minerals, etc. which are required by a subject which consumes the feed.
  • the feed composition may be, but is not particularly limited to, a plant-based feed such as grains, nuts, food by-products, algae, fibers, oils, starch, meals, grain by-products, etc., or an animal-based feed such as proteins, inorganic substances, fats, minerals, single-cell proteins, zooplanktons, fish meals, etc.
  • the feed composition is a concept encompassing a substance added to a feed ( i.e., a feed additive), a feed raw material, or a feed itself fed to a subject.
  • the subject refers to a subject to be raised, and may include any living organism without limitation, as long as it is able to intake the feed of the present disclosure.
  • the feed composition of the present disclosure may be applied to diets, i.e., feeds for a large number of animals including mammals, poultry, fish, and crustaceans. It may be used for mammals such as pigs, cattle, goats, etc. which are commercially important, zoo animals such as elephants, camels, etc., livestock such as dogs, cats, etc. Commercially important poultry may include chickens, ducks, geese, etc. Commercially raised fish and crustaceans such as trout and shrimp may also be included.
  • a content of the fermented guar meal in the feed composition according to the present disclosure may be appropriately controlled according to the kind and age of livestock, the application type, desired effects, etc., and the content may be, for example, 1% to 99% by weight, specifically 10% to 90% by weight, and more specifically 20% to 80% by weight, but is not limited thereto.
  • the feed composition of the present disclosure may include a mixture of one or more of organic acids such as citric acid, fumaric acid, adipic acid, lactic acid, etc.; phosphates such as potassium phosphate, sodium phosphate, polyphosphates, etc.; natural antioxidants such as polyphenol, catechin, tocopherol, vitamin C, green tea extract, chitosan, tannic acid, etc., in addition to the fermented guar meal.
  • the feed composition may include other common additives such as an anti-influenza agent, a buffer, a bacteriostatic agent, etc.
  • the feed composition may also be formulated into injectable formulations such as an aqueous solution, a suspension, an emulsion, etc., capsules, granules, or tablets by additionally adding a diluent, a dispersant, a surfactant, a binder, or a lubricant.
  • injectable formulations such as an aqueous solution, a suspension, an emulsion, etc., capsules, granules, or tablets by additionally adding a diluent, a dispersant, a surfactant, a binder, or a lubricant.
  • the feed composition of the present disclosure may include various kinds of auxiliary substances such as amino acids, inorganic salts, vitamins, antioxidants, antifungal agents, antimicrobial agents, etc., main ingredients such as plant-based protein feeds such as pulverized or crushed wheat, barley, corn, etc., animal-based protein feeds such as blood meal, meat meal, fish meal, etc., animal fat and vegetable oil, as well as nutritional supplements, growth promoters, digestibility promoters, and a prophylactic agent.
  • auxiliary substances such as amino acids, inorganic salts, vitamins, antioxidants, antifungal agents, antimicrobial agents, etc.
  • main ingredients such as plant-based protein feeds such as pulverized or crushed wheat, barley, corn, etc.
  • animal-based protein feeds such as blood meal, meat meal, fish meal, etc., animal fat and vegetable oil
  • nutritional supplements growth promoters, digestibility promoters, and a prophylactic agent.
  • the feed composition of the present disclosure When the feed composition of the present disclosure is used as a feed additive, the feed composition may be directly added or used together with other ingredients, and may be appropriately used according to a common method.
  • the administration form of the feed composition may be prepared in an immediate release formulation or in a sustained release formulation in combination with a non-toxic pharmaceutically acceptable carrier.
  • a non-toxic pharmaceutically acceptable carrier may be corn starch, lactose, sucrose, or propylene glycol.
  • a solid carrier it may be administered in the form of a tablet, powder, troche, etc.
  • a liquid carrier it may be administered in the form of a syrup, a liquid suspension, an emulsion, a solution, etc.
  • the administration agent may include a preservative, a lubricant, a solution promoter, a stabilizer, and may include other agents for improving inflammatory diseases and substances useful for virus prevention.
  • the feed composition according to the present disclosure may be mixed in an amount of about 10 g to 500 g per 1 kg, and specifically, 10 g to 100 g per 1 kg, based on the dry weight of a feed for livestock. After completely mixing, the feed composition may be provided to a mesh or may be subjected to pelletization, expansion, and extrusion processes through additional processes, but is not limited thereto.
  • the feed composition may further include any one enzyme selected from the group consisting of galactomannanase, celluclast, and viscozyme.
  • the enzyme may be included in an amount of 0.1%(w/w) to 1.0%(w/w), more specifically 0.1% to 0.5%(w/w), and much more specifically 0.2%(w/w) with respect to the weight of the fermented guar meal, considering the content of the guar gum in the fermented guar meal of the present disclosure, but is not limited thereto.
  • the enzyme may be an enzyme capable of reducing viscosity of the guar gum in the guar meal.
  • 1% to 3% guar gum present in the guar meal may be degraded, thereby improving digestibility.
  • Example 1-1 Changes in nutritional components of guar meal according to heat treatment temperature of guar meal
  • a method of preparing the fermented guar meal of the present disclosure may include the step of heat-treating a water content-controlled guar meal.
  • the bacterial count and trypsin inhibitors (TI) in the fermented guar meal according to heat treatment temperatures were measured.
  • guar meal 100 g were prepared, and water was added such that the water content of the guar meal was 42%(w/w). Subsequently, the guar meal was heat-treated at 70°C, 80°C, 90°C, and 95°C for 30 minutes, respectively.
  • the guar meal showed the bacterial count of 5.0 x 10 2 CFU/g and the TI content of 1.5 mg/g, and when heat treatment was performed at 95°C, the guar meal showed the bacterial count of 7.0 x 10 1 CFU/g and the TI content of 0.9 mg/g.
  • the non-heat-treated guar meal showed the bacterial count of 4.0 x 10 4 CFU/g and the TI content of 2.7 mg/g.
  • the guar meal showed the bacterial count of 3.5 x 10 3 CFU/g and the TI content of 2.1 mg/g, reaching a relative ratio of 79%.
  • the bacterial count and the TI content were high, indicating low availability as a feed.
  • Example 1-2 Changes in nutritional components of guar meal according to fermentation temperature and water content of guar meal
  • the nutritional components in the fermented guar meal according to the water content and the fermentation temperature of guar meal were measured.
  • guar meal 100 g were prepared, and water was added such that the water content of the guar meal was 40%(w/w), 45%(w/w), and 50%(w/w), respectively. Subsequently, the guar meals were heat-treated at 90°C for 30 minutes, and then cooled to 40°C, respectively.
  • a culture of Bacillus amyloliquefaciens K2G was seeded in each of the guar meals having different water contents in an amount of 10 % by weight based on the weight of the guar meal, and mixed well such that the water content was 40%(w/w), 45%(w/w), and 50%(w/w), respectively. Then, the guar meals were fermented at 35°C, 40°C, 45°C, and 50°C for 16 hours under the conditions where the temperature and humidity were constantly maintained.
  • a guar meal raw material group which did not undergo the water content-controlling step, the heat treatment step, and the fermentation step according to the present disclosure was used as a control group.
  • Example 1-3 Changes in nutritional components of fermented guar meal according to strains
  • guar meal 100 g were prepared, and water was added such that the water content of the guar meal was 40%(w/w) to 45%(w/w). Subsequently, the guar meal was heat-treated at 80°C to 95°C for 30 minutes, and then cooled to 40°C.
  • Each culture of one kind of Bacillus subtilis Bacillus subtilis ATCC 21770
  • four kinds of Bacillus amyloliquefaciens Bacillus amyloliquefaciens K2G, ATCC 23842, ATCC 23843, and ATCC 23845
  • the guar meals were fermented at 37°C to 45°C for 14 hours to 16 hours under the conditions where the temperature and humidity were constantly maintained.
  • a guar meal raw material group which did not undergo the water content-controlling step, the heat treatment step, and the fermentation step according to the present disclosure was used as a control group.
  • the guar meals fermented by seeding the Bacillus strains were found to include 62% or more of crude proteins, which is 5% or higher than that of the guar meal of the control group in which the Bacillus strain was not seeded. Therefore, when the fermented guar meal is added to a feed, a feed blending ratio may be reduced. Further, the live bacterial count in the fermented guar meal reached 10 7 CFU/g to 10 8 CFU/g. Therefore, when the fermented guar meal is added to a feed, probiotics effects may be expected.
  • Example 2 Degradation of guar gum in guar meal and change of viscosity thereof
  • guar gum 1% to 3% guar gum is present in guar meal, and viscosity of guar gum is known to slow digestion in the digestive organs, thereby inhibiting digestibility. Therefore, an enzyme capable of reducing viscosity of the guar gum in the guar meal may be added to the fermented guar meal of the present disclosure.
  • guar gum degradation of guar gum (galactomannan) or reduction of viscosity thereof according to the kind and concentration of enzymes were examined.
  • guar gum was dissolved in sterile water to prepare a 1% guar gum dilution.
  • GM galactomannanase
  • CE celluclast
  • VI viscozyme
  • GM, CE, and VI reduced the viscosity of the guar gum, and in particular, GM and VI showed excellent effects of reducing the viscosity of the guar gum. Therefore, when the enzyme is further included in a feed composition including the fermented guar meal prepared by the preparation method of the present disclosure, it is possible to provide a feed composition capable of improving digestibility and an absorption rate of a feed.
  • Example 3 Changes in sugar content in guar meal according to fermentation with Bacillus
  • a guar meal includes 4% to 6% oligosaccharides.
  • oligosaccharides raffinose and stachyose which are indigestible oligosaccharides, i.e., galacto-oligosaccharides (hereinafter, referred to as GOS) occupy 2% to 3%.
  • GOS galacto-oligosaccharides
  • the indigestible oligosaccharides may be used as a nutritional source of harmful intestinal microorganisms or may cause diarrhea. Thus, it is necessary to reduce the content thereof in the guar meal.
  • guar meal 100 g were prepared, and water was added such that the water content of the guar meal was 40%(w/w) to 45%(w/w). Subsequently, the guar meal was heat-treated at 80°C to 95°C for 30 minutes, and then cooled to 40°C.
  • Each culture of one kind of Bacillus subtilis Bacillus subtilis ATCC 21770
  • four kinds of Bacillus amyloliquefaciens Bacillus amyloliquefaciens K2G, ATCC 23842, ATCC 23843, and ATCC 23845)
  • Saccharomyces cerevisiae Saccharomyces cerevisiae
  • Lactobacillus acidophilus Saccharomyces and Lactobacillus acidophilus
  • a mixed culture of Saccharomyces and Lactobacillus acidophilus was seeded in an amount of 10% based on the weight of the guar meal, respectively.
  • the guar meals to which each strain was seeded were mixed well, and then fermented at 37°C to 45°C for 14 hours to 16 hours under the conditions where the temperature and humidity were constantly maintained.
  • the guar meals to which the culture of Saccharomyces cerevisiae, the culture of Lactobacillus acidophilus, or the mixed culture of Saccharomyces and Lactobacillus acidophilus was seeded were fermented under anaerobic conditions.
  • the contents of indigestible oligosaccharides in the fermented guar meal to which the Bacillus strain was seeded showed 80% or more reduction on average, as compared with the control group.
  • the guar meal fermented with Bacillus amyloliquefaciens K2G showed the lowest contents of indigestible oligosaccharides.
  • GOS was removed to 20% to 30% on average. Therefore, since the fermented guar meals of the present disclosure have the low contents of indigestible oligosaccharides, they may be used as feeds to improve digestibility of livestock.
  • Example 4 Changes in TI content and in vitro digestibility according to fermentation with Bacillus
  • the content of trypsin inhibitor (hereinafter, referred to as TI) in the fermented guar meal prepared according to the present disclosure and in vitro digestibility were measured.
  • guar meal 100 g were prepared, and water was added such that the water content of the guar meal was 40%(w/w) to 45% (w/w). Subsequently, the guar meal was heat-treated at 90°C for 30 minutes, and then cooled to 40°C.
  • Each culture of one kind of Bacillus subtilis Bacillus subtilis ATCC 21770
  • four kinds of Bacillus amyloliquefaciens Bacillus amyloliquefaciens K2G, ATCC 23842, ATCC 23843, and ATCC 23845
  • Saccharomyces cerevisiae Saccharomyces cerevisiae
  • Lactobacillus acidophilus Saccharomyces and Lactobacillus acidophilus
  • a mixed culture of Saccharomyces and Lactobacillus acidophilus was seeded in the guar meal in an amount of 10 % by weight based on the weight of the guar meal.
  • the guar meals to which each strain was seeded were mixed well, respectively and fermented at 37°C to 45°C for 16 hours under the conditions where the temperature and humidity were constantly maintained.
  • guar meals to which the culture of Saccharomyces cerevisiae, the culture of Lactobacillus acidophilus, or the mixed culture of Saccharomyces and Lactobacillus acidophilus was seeded were fermented under anaerobic conditions.
  • a guar meal raw material group which did not undergo the water content-controlling step, the heat treatment step, and the fermentation step according to the present disclosure was used as a control group.
  • TI contents in the guar meals fermented by the method and in the control group were measured in accordance with AOAC Ba 12-75 (American Oil Chemists' Society), and in vitro digestibility was measured in accordance with Biosen et al(1997) 2 step.
  • the measured TI content (mg/g) is shown in Table 5 below, and in vitro digestibility is shown in Table 6 below.
  • the guar meals fermented with the Bacillus strains according to the present disclosure had the TI content of 1.0 mg/g on average, indicating 60% reduction on average, as compared with the guar meal raw material.
  • the effect of reducing the TI content by fermentation was not significant in the guar meals fermented with the culture of Saccharomyces cerevisiae, the culture of Lactobacillus acidophilus, and a mixed culture thereof under anaerobic conditions, as compared with the guar meal fermented with the culture of the Bacillus strain.
  • the method of preparing the fermented guar meal of the present disclosure may reduce the TI content in the guar meal.
  • the fermented guar meal of the present disclosure may be used as a feed, the protein digestibility of livestock may be improved.
  • the guar meals fermented with the culture of the Bacillus strain showed high in vitro digestibility, as compared with the guar meal fermented with the culture of Lactobacillus acidophilus, the guar meal fermented with the mixed culture of Saccharomyces and Lactobacillus acidophilus, and the control guar meal, and this may be attributed to low molecularization of guar meal proteins in the step of fermenting the guar meal with the culture of the Bacillus strain.
  • Saccharomyces cerevisiae and Lactobacillus acidophilus appears to be unable to cause low molecularization of guar meal proteins, unlike the Bacillus strains. Therefore, when the fermented guar meal prepared by the method of preparing the fermented guar meal of the present disclosure is used as a feed, the protein digestibility of livestock may be improved.
  • Example 5 Changes in hydrolysis of guar meal protein according to fermentation with Bacillus
  • a guar meal has a protein content similar to or higher than that of a soybean meal.
  • the guar meal includes a large amount of anti-nutritional factors and high-molecular weight proteins with low digestibility, it has a disadvantage that its use for young livestock is difficult due to low digestibility.
  • the proteins with low digestibility may be improved by converting the proteins into hydrolyzed peptides or degrading the proteins into low molecular weight proteins that are easy to digest.
  • the degree of hydrolysis or the molecular weight of the proteins of the fermented guar meal were measured.
  • guar meal 100 g were prepared, and water was added such that the water content of the guar meal was 40 %(w/w) to 45 %(w/w). Subsequently, the guar meal was heat-treated at 90°C for 30 minutes, and then cooled to 40°C.
  • Each culture of Bacillus amyloliquefaciens K2G, Saccharomyces cerevisiae, and Lactobacillus acidophilus, or a mixed culture of Saccharomyces and Lactobacillus acidophilus was seeded in the guar meal in an amount of 10 % by weight based on the weight of the guar meal.
  • the guar meals to which each strain was seeded were mixed well, respectively and fermented at 37°C to 45°C for 16 hours under the conditions where the temperature and humidity were constantly maintained.
  • the guar meals to which the culture of Saccharomyces cerevisiae, the culture of Lactobacillus acidophilus, or the mixed culture of Saccharomyces and Lactobacillus acidophilus was seeded were fermented under anaerobic conditions.
  • FIG. 4 is a graph showing degree of hydrolysis of guar meal proteins according to the kind of strains. From the left, line 1 represents an extraction supernatant of a guar meal raw material group which did not undergo the water content-controlling step, the heat treatment step, and the fermentation step according to the present disclosure, line 2 represents an extraction supernatant of the guar meal fermented with Saccharomyces cerevisiae, line 3 represents an extraction supernatant of the guar meal fermented with Lactobacillus acidophilus, and line 4 represents an extraction supernatant of the guar meal fermented with Bacillus amyloliquefaciens K2G.
  • the fermented guar meal prepared using Bacillus amyloliquefaciens K2G showed a remarkable reduction in the molecular weight, as compared with the guar meal raw material group or the fermented guar meals prepared using other strains.
  • the Bacillus strains hydrolyzed the high-molecular-weight proteins of the guar meal into peptides having a small size, and therefore, the fermented guar meal of the present disclosure may be used as a protein source for young livestock.
  • Example 6 Changes in nutritional components of mixture of guar meal and soybean meal according to fermentation with Bacillus
  • a guar meal (GM) and a soybean meal (SBM) were blended at a ratio of 1:9, 5:5, and 9:1 to prepare mixtures, and water was added such that the water content of each mixture was 40 % (w/w) to 45 %(w/w). Subsequently, each mixture was mixed well, and then heat-treated at 90°C to 95°C for 25 minutes to 30 minutes. After heat treatment, each mixture was cooled.
  • Each culture of two kinds of Bacillus amyloliquefaciens ( Bacillus amyloliquefaciens K2G and ATCC 23843) was seeded in the cooled mixture of guar meal/soybean meal in an amount of 5% to 20 % by weight, and then mixed well, respectively and fermented at 37°C to 45°C for 14 hours to 16 hours under the conditions where the temperature and humidity were constantly maintained.
  • the nutritional components of the fermented guar meal/soybean meal mixture are shown in Table 7 below.
  • both of the guar meals fermented with Bacillus amyloliquefaciens showed 5.4% to 6.5% increase in the content of crude protein, as compared with that of the raw material guar meal, and both of the Bacillus strains were able to grow with the live bacterial count of 10 log. Further, the contents of the anti-nutritional factor TI and GOS were reduced, as compared with that of the raw material. All of them showed pH increase, which is attributed to ammonia produced during a metabolic process according to protease activity of Bacillus.
  • the fermented guar meal/soybean meal mixture according to the present disclosure may be very suitable for Bacillus fermentation, and through fermentation, the content of crude protein was increased and the contents of the anti-nutritional factor TI and GOS were reduced, thereby greatly improving digestibility.
  • Example 7 Evaluation of fermented guar meal by broiler breeding test
  • a broiler breeding test was performed. To perform the breeding test, broilers were acclimated for 4 days, and fed for total 21 days (3 weeks) with a soybean meal or a feed in which 3%, 5%, or 7% of soybean meal was replaced by the fermented guar meal, and the broiler's body weight and feed intake were examined. The test was designed using total 80 broilers of 4 treatments X 4 repeats X 5 birds.
  • guar meal 100 g were prepared, and water was added such that the water content of the guar meal was 40 %(w/w) to 45 %(w/w). Subsequently, the guar meal was heat-treated at 90°C for 30 minutes, and then cooled to 40°C. The culture of Bacillus amyloliquefaciens K2G was seeded in the guar meal in an amount of 10 % by weight based on the weight of the guar meal. The guar meal to which the strain was seeded was mixed well, and fermented at 37°C to 45°C for 14 hours to 16 hours under the conditions where the temperature and humidity were constantly maintained, followed by drying.
  • the fermented guar meal prepared using Bacillus amyloliquefaciens K2G was replaced by 5%, the broiler's body weight and feed intake (FI) were increased, as compared with those fed with only the soybean meal. That is, these results indicate that there is no problem in preference for the fermented guar meal, and a strong grass smell which is the raw guar meal's own smell was reduced, and its feed conversion ratio (FCR) was also similar to that of the soybean meal. Therefore, the fermented guar meal prepared according to the present disclosure may be widely used in the future as a protein source to replace the soybean meal.
  • FI broiler's body weight and feed intake

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